• The Seamless Bikini - Black, Undies - First Thing Underwear
  • The Seamless Bikini - Black, Undies - First Thing Underwear
  • The Seamless Bikini - Black, Undies - First Thing Underwear
  • The Seamless Bikini - Black, Undies - First Thing Underwear
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The Seamless Bikini - Black

The Seamless Bikini - Black

$25.00 AUD
$25.00 AUD
Sale Sold out
Taxes included. Shipping calculated at checkout.
Colour: Black
Core:
Limited Edition:
Size

Meet your new go-to Seamless Bikini for a second skin feel. Crafted from buttery-soft and lightweight fabric for all day comfort. With luxe bonded edges for a smooth, no-show fit and invisible lines. Featuring an extra long liner made from breathable, moisture-wicking fabric. Perfect for everyday wear. Model wears size S.

Size & Fit

Fits true to size. Take your normal size. Use our Fit Guide for help.

Shipping & Returns

Returns and exchanges are not accepted on undies for hygiene reasons.

Fabric & Care

84% recycled polyamide, 16% elastane.

Cold gentle machine wash. Use lingerie bag where possible. Do not tumble dry.

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Customer Reviews

Overall rating: 4.0 / 5 from 20 reviews.

Really great fit that looks so good on gals with extra padding around the hips and butt (I’m usually a size12 and bought the large) I bought one pair to try then bought three more pairs! Love them. Love the colour. Am hoping the put them out as bathers too!

Sarah B. 5/5 Verified

The Seamless Bikini - Cherry Limited Edition

Wonderful comfortable under wear , I have just ordered recently another pair of pants and 2 matching Bras I am very excited about them Thanks you for a wonderful product 🙏🌸

Carolyn M. 5/5 Verified

The Seamless Bikini - Taupe

Doesn’t even feel like you’re wearing undies. Silky smooth and very comfortable!

Natalie W. 5/5 Verified

The Seamless Bikini - Blush

The best investment of the year for me - super comfy and just what I was looking for in a cheeky bum underwear. Nothing falls out and they’re super comfortable and flattering under clothes. I’ve recommended to my friends.

Lara T. 5/5 Verified

The Seamless Bikini - Black

True to size and a great seamless staple in any underwear drawer

Hannah D. 5/5 Verified

The Seamless Bikini - Umber

Silky smooth, sits flush against the skin ensuring no undie lines. My only complaint is I’m a sensitive girlie and although I do appreciate the cotton lining, it still wasn’t breathable enough for all day wear, running around in the heat.

Chloe B. 4/5 Verified

The Seamless Bikini - Taupe

Good quality, however size guide is inaccurate (runs small) and they’re uncomfortable as they ride up.

Alanna V. 2/5 Verified

The Seamless Bikini - Black

This was my second purchase from First Thing and found the sizing so different on this style. Would not be my first choice if I purchase again

Megan A. 2/5 Verified

The Seamless Bikini - Taupe

Feels like a nasty strip of plastic pinching my sensitive parts. I'll stick to more natural materials.

Electra F. 1/5 Verified

The Seamless Bikini - Black

Very thin, with a tight waistband I unfortunately don't expect them to last more than one or two washes

Brooke P. 1/5 Verified

The Seamless Bikini - Blush